4. Calculate the circumference of a circle with each measurement.
a) radius 2.5 km
b) radius 26 cm
c) diameter 3.0 cm
d) diameter 21 cm
could you also explain how to do it and not just give the answer

Plz hurry finals a paper cup in the shape of an inverted cone is 8 inches tall and has a radius of 1.5 inches. how much water can the cup hold? use 3.14 for pi. round the answer to the nearest tenth. a) 12.6 cubic in. b) 18.8 cubic in. c) 37.7 cubic in. d) 56.5 cubic in.